package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

        //微信服务接口地址
        public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

        @Autowired
        private WeChatProperties weChatProperties;
        @Autowired
        private UserMapper userMapper;

    @Override
    public User wxlongin(UserLoginDTO userLoginDTO) {
        //拿到openid
        String openid = getOpenid(userLoginDTO.getCode());
        //看看拿没拿到
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //看看是不是新用户，新用户直接注册
        User user = userMapper.getByOpenId(openid);
        if (user == null){
            user = User.builder().
                    openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回对象
        return user;

    }



    /**
     * 调用微信接口服务，获取微信用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
        //调用微信接口服务，获得当前微信用户的openid
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
